Electrical control apparatus.



W. M. SCOTT. ELECTRICAL coNTRoL APPARATUS.

APPLICATION FILED JAN.6, 1910.

Patented May 30, 1911.

W. M. SCOTT. ELECTRICAL CONTROL APPARATUS. APPLICATION FILED JAN. 6,1910.

993,417. Patented May 30,1911.

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W. M. SCOTT. ELECTRICAL CONTROL APPARATUS. APPLICATION FILED JAN. 6,1910.

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UNITED STATES PATENT OFFICE.

WILLIAM MI. SCOTT, 0F PHILADELPHIA, PENNSYLVANIA., ASSIGNOR TO THECUTTER ELECTRICAL AND MANUFACTURING COMPANY,

A CORPORATION OF NEW' JERSEY.

'ELECTRICAL CONTROL APPARATUS.

Specification of Letters Patent.

Patented'May 30, i911.

Application led January 6, 1910. Seria1`No. 536,718.

To all 'whom 'it may concern:

Be it known that I, W'ILLIAM M. SCOTT, a

citizen of the `United States, residing at Philadelphia, in the countyof Philadelphia and State of Pennsylvania, have invented a new anduseful Electrical Control Apparatus, of which the following is aspeciication.

My invention relates to electrical control apparatus, and particularlyto apparatus for controlling heavy electric currents such as used inelectric lighting and electric power practice.

My invention resides in electrical control apparatus comprising two ormore electric switches or automatic circuit breakers which are operatedalternately or in a certain order of succession, means beingvprovidedfor insuring that a switch or circuit breaker is tripped Ior is openedbefore another is closed.

By preference, the switches or circuit breakers are moved to theircircuit closing positions by an electric motor, suitable gearingintervening for driving purposes, and 'suitable mechanism being providedfor making and breaking mechanical connection be-V tween the switches orcircuit breakers and the motor; and it is a further feature of myinvention that the mechanisms of the different switches or circuitbreakers for' making and breaking mechanical connection with the motorare so interrelated, either electrically or mechanically, or both, thatonly the mechanical connection making mechanism of that switch orbreaker which is to be closed can be thrown into operation. My inventionrelates to a plurality of switches or circuit breakers operated by andunder the control of a single motor, the arrangement being such thatonly one of the switches or breakers-may be closed at a time. Thearrangements are such that both electrical and mechanical interlockingis secured, and the arrangement is consequently effective either whenthe switches or breakers are operated by hand or by the motor.

In another aspect my invention resides in l l i i a transfer switch,wherein a consumption circuit may be placed alternately in communicationwith different supply circuits, or, vice versa, a supply circuit may beput in communication alternately with diilferent consumption circuits,the electrical and mechanical interlocking being such that the alternateoperation of the switches or breakers is absolutely determined.

My invention resides also in circuit arrangements and connections forcontrolling the apparatus such as above described.

My invention resides also in other features hereinafter described andclaimed.

For an illustration of some of the many forms my invention may take,reference is to be had to the accompanying drawings, in which:

Figure l is a side elevational view of two switches or circuit breakersand their operating, mechanism. Fig. 2 is a top plan View of the drivingmechanism. Fig. 3 is a side elevational View of the parts shown in Fig.2, some parts being shown in section. Fig. 4 is a diagrammatic View ofonev arrangement myy invention may take as to the circuits andconnections of the control apparatus. Fig. 5- is a front elevationalView of two switches or breakers and their operating mechanism ofmodified form. Fig. 6 is a top plan View of the motor and drivingmechanism shown in Fig. 5. Fig. 7 is a side elevational view of theapparatus shown in Fig. 6, some parts being shown in section.

Referring to Fig. l, a suitable base l, preferably of insulatingmaterial, such as marble or slate, and as, for example, a panel of aswitchboard, has secured upon its front face two switches or automaticcircuit breakers. Each switch or circuit breaker comprises `mainterminal blocks 2 and '3 secured upon the 4front face of the base l, theupperternnnal by a stud 4 which servos also for electrical connection toa bus bar or other conductor by means of the nuts 5. The lower terminal3 communicates with the usual overload tripping coil 6 whose otherterminal communicates with the stud 7 forming the other terminal of theswitch or breaker, nuts 8 being provided for electrical connections tothe stud 7 as by bus bar or other suitable conductor. 1

Adapted to engage and bridge the main terminals 2 and 3 is the laminatedbridging member 9 supported upon the arm 10 pivoted to the bracket orhousing 11 at 12. The usual intermediate stationary metallic shuntcontact 13 and the stationary carbon shunt Contact 14 are provided andwith them are adapted to engage, respectively, the movable metallicshunt contact 15 and the movable carbon shunt contact 16, contacts 15and 16 being supported by the arm 10.

Pivoted at 17 in the bracket or housing 11 is the operating handle 18which extends inwardly toward the base beyond the pivot 17 and hasformed at its inner end the cam surace 19 adapted to engage a rollercarried by the arm 10 and pivoted thereon at 20. Piv oted at 21 upon theoperating lever or arm 18 is a latch roller 22 engaged by the hook latch23 to lock the switch or breaker in cir cuit closing position. The latch23 is pivoted to the frame or housing 1l at 24 as is also the latchactuating member 25 having the tails 26 and 27. The latch actuator 25carries the adjustable screw 28 adapted to engage upon the top of thelatch 23 to actuate the same. The tail 26 extends into the path oftravel of the member 29 carried by the armature 30 pivoted at 31 andcoperating with the electromagnet 32. And the tail 27 of the latchactuator 25 extends into the path of travel of the armature 33coperating with the overload tripping coil 6.

For closing the two switches or circuit breakers there are providedbelow them, mounted upon the board or base 1, an electric motor andapparatus driven and controlled thereby. In the arrangement shown inFigs. 1, 2 and 3, the electric motor M is mounted with its shaftvertical and the motor is supported upon the sub-base 34 secured in turnupon the base 1. And upon the sub-base 35 also mounted upon the base 1are secured the brackets or housings 36 and 36. Ext/ending across theunder sides of the brackets or housings 36 and 36 is a member 37 formingor carrying step bearings for the three spur gears 38, 39 and 46, thegear 39 being secured upon' the shaft of the motor M and meshing withbot-h gears 38 and 4() whose spindles or shafts are also vertical.Connected to the shaft or spindle of the gear 38 by universal joint 41is the shaft I or spindle 42 upon which is secured the I worm 43, theupper end of the shaft 42 passl ing through the slightly elongatedopening l 44 in the rocking arm or member 45 pivoted at 46V upon thehousings or stationary part of the apparatus. Similarly, the shaft orspindle 47 is secured by universal joint to the sha-ft or spindle of thegear 40 and ertends through the slightly elongated opening 44 in theother end of the member 45. The shaft 47 also carries a worm 43. J ustbelow the member 45 on the shaft or spindle 42 is a loose collar 48 towhich is pivoted at 49 one end of a link 50 pivoted at 51 to a secondlink 52 which is, in turn, pivoted to the housing or base at 53. Thelinks 50 and 52 constitute a toggle. To the pin 54 carried by the link52 is pivoted one end of a vertically' extending ear 55 upon thearmature member 56 of an electromagnet whose winding is 57 having themagnetic jacket 58. Secured to the jacket 58 is a downwardly eX`-tending cylinder member 59 within which is disposed a spiral spring 60,abutting at its lower end against a plate supported by the head 61secured to the cylinder 59 and pressing with its upper end against theplate 611L secured to the rod or pin 61b having a yielding connectionwith the armature member 56, the spring 60 being in compression and thusnormally tending to raise the armature member 56 to collapse the toggle50, 52. In the other switch or circuit breaker of the pair and itsoperating mechanism the same reference characters, with the addition ofprime marks, indicate like parts to those above described. The worm 43,under the control of the electromagnet whose winding is 57, is adaptedto mesh with and drive the worm wheel 63, pivoted in the bracket orhousing 36 at 64. The wheel 63 carries a crank 65 to which is pivoted at66 the connecting rod 67 terminating in an adjustable head 68pivoted at69 to the link 70 pivoted at 71 to the outer end of the operating lever18 at the axis oit the hand grip 18. And for .operating the other switchor breaker, the

worm 43 is adapted to engage the worm wheel 63 which is connected bysimilar parts to the operating lever 18 ot the other switch or breaker.

Pivoted at 72 to the arm 18 is the rod 73 secured to and longitudinallyadjustable with respect to the head 74. ln Fig.- 1 the rod 73 is shownbroken away for the sake of clearness. At its lower end it is providedwith a longitudinally slotted head 7 5 carrying an adjusting screv:r 76for determining the amount of travel the member 77 may have in the slot.The member 77 is pivoted to the crank 78 and the latter is pivoted at 79to a fixed part of the apparatus` such crank 78 controlling the windingmechanism and the latch of a snap switch (such, for example, asillust-rated in my application Serial Number 464,732) whose movableblade 80 is also pivoted at 7 9, a binding post l 81 serving forelectrical communication with the snap switch blade 80. This blade 80 isadapted to engage the yielding contact 82 mounted upon a fixed portionof the apparatus and forced outwardly by the spring 83. The binding post84 serves for electrical communication with the contact 82.

As seen in Fig. 1, a crank 85 is pivoted upon the pin 86 extendingthrough a slot in the housing 36 and connected to the pin 49, shown inFigs. 2 and 3, at the outer end of the toggle link 50. This pin 86,therefore, has a movement to right and left, as viewed in Fig. 1, withthe worm shaft, being operated simultaneously therewith by the toggle50, 52. At its outer end the crank 85 is pivoted at 87 to the crank 88pivoted to the housing at 89 and carrying the movable con-' tactv lever90 of a switch. By the movement of the pin 86 to the right or left, theswitch member 90 is moved upon its pivot 89. `In the position shown inFig. 1, the switch blade 90 is in engagement with contact 91. ln itsother position it engages contacts 92 and 93.

Referring to Fig. 4, showing diagrammatically the two switches orbreakers and the operating and control apparatus and circuits,conductors 94 and 95 represent the conductors which extend' to anysuitable source of current. The conductor 94 communicates directly withthe contacts 96 and 97 carried by the switch arm 98 pivoted at 99 andhaving the operators handle 100. The contact 96 is adapted to engagevcontact 101 and contact 97 is adapted to engage contact 102, the switchlever 98, when released, being brought back to `central or normalposition by gravity or spring control. At its lower end the switch lever98 carries the contact 103 adapted to engage either of contacts 104 and105. Between contact 104 and the switch lever 98 is connectedtheincandescent indicating lamp 106; and between the contact 105 and theswitch blade 98 is connected the electric incandescent indicating lamp107. The switch having the contacts 96 and 97 and the other contacts andlamps as described, inay be located at a remote point, and thusremotelycontrol the switches or circuit breakers and their operatingmechanism; or such switch may be located near at hand. y

There is a circuit completed through lamp 106 from conductor 94 throughcont-act 104, conductor 108, tripping coil 32, stationary contact 109,bridging contact 110, stationary Contact 111 to conductor 95 causing thelamp 106 to glow. The contacts 109 and 111 are disposed upon the base 1between `the upper and lower main contacts 2 and 3. The bridging contact110 is carried by but insulated fromv the movable contact member 9. And,similarly, when the right hand breaker or switch shown in Fig. 4, isclosed there is a circuit :trom conductor 94 through lamp 107 throughtripping coil 32, contact 109', bridging contact 110', contact 111 toconductor 95. When one of these lamps is burning or glows'the operatorknows that the switch or circuit breaker corresponding with the glowinglamp is in circuit closing position, and the other lamp being dark, heknows that the other breaker or switch is open, which it must be due tothe nature of the control and control apparatus.

The operation is as follows: The lett hand switch or breaker, as viewedin Fig. 4, being in circuit closing position, and the right hand switchor'breaker being in open posi` tion, the operator at the switch 98 knowsby the glowing of lamp 106 which switch or breaker is closed and whichis open. When it is desired to open the lefthand switch or breaker andclose the right hand switch or breaker, the operator grasps handle 100and rotates the switch arm or lever 98 in a clockwise direction aboutits pivot 99, first bringing contacts 103 and 104 into engagement witheach other. This short circuits the lamp 106 and the increased currentthen flowing through tripping coil 32 is suilicient to trip the lefthand switch or breaker and it fiys to open-position, the -inal breakcoming at the shunt carbons as well understood in the art. As the lefthand breaker of Fig. 4, being the front breaker shown in Fig. 1, opens,its operating handle 18 rotates in a counter-clockwise direction aboutits pivot 17, as viewed in Fig. 1. This raises connecting rods 67 and73. The upward movement of rod 7 3 lcauses the screw 7 6 carried at itslower end to engage the member 77 to rotate the crank or lever 78 andthus bring contact 80 into engagementwith contact 82 which controls theoperating motor M. As the operator continues the rotation oit switchlever 98, contact 97 engages contact 102, allowing current to flow from.conductor 94 through contacts 97 and 102, thence through conductor 112to contact 91 of the right hand switch or breaker mechanism, throughYthe switch blade 90', through the resistance 113, thence through theseries lield winding F of the motor M, thence throughthe armature A ofthe motor M, through conductor 114 through switch blade 80, contact 82',thence by 'conductor 115 to switch blade 80 (which, due to the openingof the left hand switch or breaker, is in engagement with contact 82 asabove described) through con- `tact 82'to conductor 95. And currentflows also through winding 57 in parallel -wi'th' the resistance 113 andthe lield winding F. The winding 57 being thus traversed by currentcauses the armature 56 of the right hand switch or breaker to beattracted downwardly (see Fig. 3) causing the toggle 50', 52', to movethe worm 43 into mesh with the worm wheel G3. Simultaneously, the motorM starts to rotate, always in the same direction, and drives the wormwheel 03 through the worm 43', gear 40 and gear 39. This causes thedownward movement of the connecting rod (57 which causes the clockwiserotation of the operating arm 18 ot the right hand breaker causing thesame to be moved to circuit closing position where it is locked by itslatch correspon-ding with latch 23. And as the toggle 50', 52 isextended it causes the movement of the switch lever 90 away from contact91 and into engagement with contacts 92 and 93 .through the agency ot'cranks corresponding with cranks 85 and 88. When the switch arm 90 hasengaged contacts 92 and 93 the resistance 113 is short circuited givingthe motor M more power. And the engagement of the contact 90 withcontact 92 transfers the motor as to its supply directly to theconductor 941 instead of indirectly through the switch 98. The effect,then, is to rob the switch 08 ot' control after the closing movement hasonce begun. in other words, if the operator at switch 98 brings contact07 into engagement with contact 102, and immediately separates themagain, the right hand breaker will, nevertheless, be closed. Then theright hand breaker reaches tull circuit closing position, its rod 73pushes downwardly upon the member '77l of its snap switch rotating .itscrank 78 and unlatching the snap switch, allowing the switch blade 80 tosnap away from contact 82, breaking the motor circuit and denergizingwinding 57 allowing the spring corresponding with spring 00 of F ig. 3to knee or collapse the toggle 50', 52, to move the worm 43 away `t'romthe worm wheel 63 thus disconnecting the circuit breaker operatingmechanism trom the motor M. Simultaneously, however, the pincorresponding with pin 86 of Fig. 1 moves back again thus causing thecontact lever 90 to again engage contact 91. And, similarly, when theleft hand breaker, as viewed in Fig. Ll, is open and the right handbreaker is closed, the operator moves lever 80 in a counter-clockwisedirection lirst bringing contacts 103 and 105 into engagement thus shortcircuiting lamp 107 and allowing increased current to flow through 1 thetripping winding 32 to trip the right hand breaker or switch. Thisbreaker in opening raises its rod 73 with the result that its switch arm80 engages contact 82 in the circuit of the motor M. As the operatorcontinues his movement he brings contacts 96 and 101 into engagementwith each other, thus allowing current to 'dow from conductor 941through contacts 96 and essai? 101 thence through conductor 116 tocontact 91 thence through contact 90 through the resistance 113 and thefield winding F and the motor armature A through switch lever 80 andcontact 82 through conductor 115 and through switch arm 80 and contact82 (these latter being in engagement with each other when the left handbreaker is open) to conductor 05. Current also flows through theelectromagnet winding 57. The motor is then simultaneously started andthe worm Lt3 brought into engagement with worm vwheel 63, the motor thenpulling downwardly on the rod G7 causing the lefthand breaker to beclosed and locked by its latch 23. T/Vhen it reaches circuit closingposition, the rod 73 has pushed downwardly upon the member 77 to actuatethe crank 78 and unlatch the snap switch whose blade 80 then separatesfrom contact 82 to break the motor circuit and also to denergize thewinding 57 whereupon the spring G0 knees or collapses the toggle 50, 52,and moves the worm 43 out of mesh 'from the worm wheel 63.

1t will be noted that since the worm shafts 4:2 and #t7 extend throughslotted openings in the rocker bar 45, when one toggle is extended tomove its associated worm into engagement with the associated worm wheelthe other worm is and must be positively carried away from itsassociated worm wheel. Thus, it is mechanically impossible to drive bothworm wheels simultaneously from the motor. They must be alternatelydriven and therefore the circuit breakers or switches can not besimultaneously closed, but must be alternately closed.

rEhe bridging contact 9 ot the lett hand switch or breaker, as viewed inFig. l, may be a part of or control the same circuit or a differentcircuit from that controlled by the bridging member 0 of the right handbreaker or switch. For example, the lower terminals 3 and 3 ot the twoswitches or breakers may connect with the same conductor of aconsumption circuit, while the upper terminals and 2 may connect eachwith a conductor ot' a different circuit, such as different supplycircuits. Thus, when the left hand breaker is closed the energ iconsumed by the apparatus such as'motors, lighting circuits, etc., issupplied from one supply circuit through the lett hand breaker orswitch. But upon opening the left hand breaker or switch and closing theright hand one, by the apparatus above described, the energy is derivedfrom a diiterent supply circuit. 1t will, therefore, be understood thatby the apparatus shown and described, as to one oit its many uses, willprevent a consumption circuit from being simultaneously in communicationwith two supply circuits. 1n other about the pivot 121.

words, the apparatus insures that when communication with ,one supplycircuit is closed, the communication with the other supply circuit ispositively interrupted.

While in Fig. 4 only two single pole switches are shown it is. to beunderstood that a pair as shown in Fig. 4 may be used to controlcommunication with one conductor of a consumption circuit, while anothersimilar pair may be used toy control communication with anotherconductorv of that consumption circuit.

IVhilein Figs. 1, 2 and 3 I have shown one form of the switch or breakeroperating mechanism, it is to be understood that my invention embracesmany other forms and is not limited to the specific forms illustrated.

The arrangement as shown in Fig. 1 with the motor shafts vertical isadvantageous where room laterally on the switchboard or base must beeconomized. lVhere such economy of space is not necessary, however, themotor may be mounted with its shaft horizontal as shown in Figs. 5, Gand 7. Here the parts are the same as in the figures heretoforedescribed, except that the shaft of the motor M carries at itsends thebevel gears 117 and 117 meshing` respectively with the bevel gears 118and 11S. The bevel gears 118 and 118 are secured respectively upon thevertically extending sleeves or collars 119 and 119 which carry at theirupper ends the worms 120 and 120. The sleeves or collars 119 arerotatable upon vertical shafts movable about a horizontal pivot 121, theupper end of the shafts being provided with heads 122 and 122 pivotedrespectively to the toggle links 50 and 50. The pivot 121 beingconcentric with the motor shaft or gears 117 and 117 when the togglesextend or collapse, the worms are brought into or from engagement withthe associated worm wheels 63 and 63', the rotation taking place paratusis the same as illustrated in Figs. 1, 2 and 3.

What I claim is:

1. In combination, a plurality of switches or circuit breakers, a motorfor operating the same, means for mechanically connecting anddisconnecting lsaid motor and each switch or circuit breaker, andmechanical means controlling said connecting and disconnecting means forinsuring that a part only of said switches or circuit breakers shall beoperated by said motor at a given time.

2. In combination, a' plurality of switches or circuit breakers, a motorforoperating the sa'me, means for mechanically connecting and`disconnecting said motor and each switch or circuit breaker, and meansmechanically interconnecting said connecting and disconnecting means,whereby when a switch Otherwise the ap' or circuit breaker is operatedby said motor another switch or circuit breaker is insured againstoperation by said motor.

n '3. In combination, a plurality of switches or circuit breakers, a'motor for operating the same, disengageable mechanicalconnections forconnecting each of said switches or circuit breakers with said motor,and mechanical means for preventing simultaneous connection between allof said switches or circuit breakers and said motor.

4; In combination, a plurality of switches or circuit breakers, a motor,gearing intervening betweensaid motor and each of said switches orbreakers, motor connecting and disconnecting means for eachk switch orbreaker', and ai mechanical connection between said motor connecting anddisconnecting ymeans of the switches or breakers lfor insuring less thanall the switches or breakers being operated by said motor.

5. In combination, a plurality of switches or circuit breakers, a motor,means interveningbetween said motor and each of said switches orbreakers for connecting and dis? connecting the same with and from saidmotor, mechanical means interconnecting said means of the vdierentswitches or breakers, n

whereby when one of said means is operative another is inoperative, andelectro-responsive means for each switch or breaker for controlling saidmechanical interconnecting means.

6. In combination, a plurality of switches or circuit breakers, a motor,a worm and gear intervening between said motor and each of said switchesor breakers, the worms .being movable into and out of engagement withtheir associated gears, a member connecting A the worms of the differentswitches or breakers insuring their alternate operation, and means foroperating the worm of each switch or breaker.

7. In combination, a plurality of switches or circuit breakers, a motor,means intervening between said motor and each of said switches orbreakers for connecting and disconnecting the same with and from saidmotor, a pivoted lever connected to said means for insuring theiralternate operation, and electro-responsive means for actuating saidlever.

8. In combination, a plurality of switches or circuit breakersfa motor,means intervening between said motor and each of said switches orbreakers for connect-ing and disconnecting the same with -and from saidmotor, mechanical means insurin alternate engagement of said means,electr magnetic means for controlling each of said means, and a switchfor controlling said motor and said electro-magnetic means.

9. In combination, a plurality of switches or circuit breakers, a motor,means intervening between said motor and each ot' said switches orbreakers for connecting and disconnecting the same with and from saidmotor, a member for insuring alternate engagement of said means,electro-magnetic means forl controlling each of said means, a trippingcoil for each switch or breaker, and a switch controlling said trippingcoil, said electro-magnetic controlling means, and said motor.

10. In combination, v a plurality of switches or circuit breakers,'tripping coils therefor, a motor, a connecting and discon necting meansbetween said motor and each of said switches or breakers, mechanicalmeans insuring the alternate operation of said means, electro-magneticmeans controlling each ot' said connecting and disconnecting means, anda switch for iirst controlling said tripping coils and thereaftercontrolling said motor and said electro-,magnetic means.

11. In combination, a plurality of switches or circuit breakers, amotor, connecting and disconnecting means intervening between said motorand each of said switches or breakers, mechanical means for insuring thealternate operation of said means, electro-magnetic means for control-2ling each of said connecting andl disconnecting means, a control switchfor controlling said electro-magnetic means and said motor, a switch forbreaking the motor circuit when the corresponding switch or breaker hasreached normal position, and a switch for maintaining said motor circuitclosed independently of said control switch.

12. In combination, a plurality of switchesl or l` circuit breakers, amotor, connecting and disconnecting means intervening between said motorand each of said switches or breakers, a member connecting said meansfor insuring their alternate o eration, and controlling yswitches andcircuits for insuring the opening of a switch or breaker before theclosure of another by said motor. y

13. In combination, a plurality of main switches, of a motor foroperating the same, means for insuring that a part only of said' mainswitches shall be operated by said motor at a given time, a motor switchfor each of said main switches, each motor switch 4being opened when itsmain switch has been moved to normal position by said motor, the circuitof said motor being closable only when all of said motor switches areclosed.

14. In combination, a plurality of main switches, of a motor foroperating the same, means for insuring that a part only of said mainswitches shall be operatedfby said motor at a given time, a motor switchfor each essere' of said main switches, each motor switch being openedwhen its main switch has been moved to normal position by said motor andeach motor switch closed when its main switch has moved to abnormalposition, the circuit of said motor being closable only when all of saidmotor switches are closed.

15. In combination, a plurality ot' main switches, a motor for operating'the same, mechanical means insuring that all of said main switchesshall not be simultaneously operated by said motor, an operators switchfor starting said motor, and a switch associated with each oit said mainswitches for maintaining said motor energized after it has been startedby said operators switch.

16. In combination, a plurality ot' main switches, a motor for operatingthe same, a trip coil for each main switch, a disengageable mechanicalconnection between said motor and each oit said main switches, anengaging coil for each main switch causing mechanical connection betweensaid main switch and said motor, and an operators switch for irstenergizing a trip coil of one main switch and then energizing saidengaging coil of another main switch.

17. In combination, a plurality of main switches, a motor for operatingthe same, a l,disengageable connection for each main switch forconnecting and disconnecting the same with and from said motor,mechanical means for insuring that a part only of said disengageableconnections shall be simultaneously operated, a trip coil for each mainswitch, an engaging coil tor each main switch controlling itsdisengageable connection, and an opcrators switch for first energizingthe trip coil of a main switch and thereafter energizing the engagingcoil ot another main switch.

18. In combination, a plurality of switches or circuit breakers, amotor, means intervening between said motor and each ot' said switchesor circuit breakers it'or connecting and disconnecting the same with andsaid means for insuring 'their alternate operation.

19. In combination, a plurality oit switches or circuit breakers, motortor operating the same, means for mechanically connectingl anddisconnecting said motor and each switch or circuit breaker7 an engagingcoil for each switch or circuit breaker for aetnating said mechanicalconnecting and disconnecting means, `and means independent oi" saidengaging coils and their circuits control-- ling said connecting anddisconnecting means for insuring that a part only of said switchesl orcircuit breakers shall be operated by said motor at a given time.

20. In combination, a plurality of switches from said motor, and a leverconnected to or circuit breakers, a motor for ,operating the same, meansfor mechanically connecting and disconnecting said motor and each switchor circuit, breaker, means controlling said connecting and disconnectingmeans for insuring. that a part only of said switches or circuit'breakers shall be operated by said motor at a given time, and a motorcontrolling switch for each of said switches or circuit breakers.

21.' 4In combination, a plurality of switches or circuit breakers, amotor, a worin vand gear intervening between said motor and each of saidswitchesor circuit breakers, the worms being movable into and out ofen--' gagement with their associated gears, and a member connecting theworms of the different switches or circuit breakers insuring theiralternate operation.

22. In combination, a plurality of switch-es or circuit breakers, amotor, a worm and gear intervening Vbetween said motor .and each of saidvswitches or breakers, a toggle for each worm to move` the same into andout of engagement with its associated gear, and a member connecting theworms of the different switches or circuitbreakers insuring theiralternate operation.

Q3. In combination, a plurality of switches or circuit breakers, amotor, a worm and gear intervening between said motor and each of saidswitches orbreakers,a toggle for each worm to move the same into and outof engagement with its associated gear, a member connecting the worms ofthe different switches or circuit breakers insuring their alternateoperation, and electro-magnetic means controlling said toggles.

24:. In combination, a plurality of main switches, a motor, a'worm andgear intervening between said motor and each of said switches, meansactuating each worm to move the same into and out of engagement.

with its associated gear, a member connecting the wormsof the differentmain switches.

insuring their alternate operation, an operators switch controlling saidmotor and said worm actuating means, and a switch controlled by saidworm actuating means for maintaining said motor energized independentlyof said opera't-ors switch.

25. In combination, a plurality of switches or circuit breakers, amotor, a worm' and gear for each switch or circuit breaker, a lshaft foreach worm, a driving shaft for each worm shaft, a universal'jointbetween each driving shaft and it-s worm shaft, and a member connectingthe worms of the dif- -ferent switches or breakers insuring theiralternate operation.

26. In combination, a main switch, an operating member therefor, meansrestraining said main switch in normal' position, electroresponsivemeans for tripping said main switch, a, motor for actuating saidoperating member, a disengageable mechanical connection between saidmotor and said operating member, an auxiliary switch controlling thecircuit of said motor, an operating member for said auxiliary switch,and a member yconnected to the operating member of said main switch orbreaker and having lost motion connection with the operating memberv ofsaidv auxiliary switch, said main switch operating member and, saidmember connectedl thereto moving independently of '27. In combination, aplurality of switches or circuit breakers, a motor, a bevel gear foreach switch or circuit breaker driven by said motor, a pivoted shaft forsaid bevel gear, a worm on said shaft, and a member connecting the wormsof the different switches or circuit breakers insuring their alternateoperation. o

28. In combination, a plurality of switches or circuit breakers, a motorfor actuating the same, a bevel gear for each switch or circuit breakerdriven by said motor, a pivoted shaft for said bevel gear, a worm kon.each shaft, a second bevel gear for driving each of said bevel gears,said pivoted shaft being swingable about the center of said second bevelgear.

or circuit breakers, a motor for actuating the same, a bevel gear foreach switch or circuit 'breaker driven by said motor, a pivoted shaftfor said bevel gear, a worm on each shaft, a second bevel gear fordriving each of said bevel gears, said pivoted shaft being swingableabout the center of said second bevel gear, and a member connecting theworms of the different switches or circuit breakers insuring theiralternate opcration.

30. In combination,a plurality of switches or circuit breakers, a motorfor operating the same, means for mechanically connecting anddisconnecting said motor and each switchcor circuitbreaker, meanscontrolling said connecting and disconnecting means for insuring that apart only of said switches 0r circuit breakers shall be operated by saidmotor at a given'time, an engaging coil for actuating each of saidconnecting and disconnecting means, a motor control switch for each ofsaid switches or circuit breakers, an operators switch controlling saidmotor through said motor control switches, and a switch for each switchor circuit breaker actuated rby its engaging coil for maintain ing saidmotor energized after initial energization by said operators switch.

31. In combination, a plurality of Vswitches `or circuit breakers, amotor for operating 29. In combination,a plurality of switches saidmotor when said main switch is tripped.

the same, disengageable connecting means an operators switch controllingsaid motor,

and a second control switch for each oit said switches or breakersactuated by its engaging coil, a resistance for each of said switches orbreakers in series with said motor, said second control switch whenactuated short circuiting said resistance and maintaining said motorenergized independently of said operators switch.

32. In combination, a plurality of main switches or breakers, a .motorfor operating the same, a trip coil for each main switch or breaker, amotor control switch for each main switch or breaker, an operatorsswitch for controlling said motor through said motor control switchesand for energizing said trip coils,the motor switch of alnain switch orbreaker being closed after its tripping coil has been energized.

eeafii'r 33. In combination, a plurality of switches or circuitbreakers, a motor rotating always in one direction for operating thesame, means for mechanically connecting and disconnecting said motor andeach switch or circuit breaker, means controlling said connecting anddisconnecting means for insuring that a part only of said switches orcircuit breakers shall be operated by said motor at a given time, alatch for restraining each of said switches or circuit breakers innormal posit-ion, and means for tripping each of said switches orcircuit breakers, the opening of each switch or circuit breaker beingindependent of either actuation or control by said motor.

In testimony whereof l have hereunto affixed my signature in thepresence of the two subscribing witnesses.

TVllLLlAli/l M. SCOTT.

Witnesses:

ELEANOR T. MCCALL, ANNA E. Srninook.

